
        body {
            background-image: url('../images/经贸.png');
            background-size: cover;
            font-family: Arial, sans-serif;
            background-color: #f4f4f4;
            display: flex;
            justify-content: center;
            align-items: center;
            text-align: center;
            height: 100vh;
            margin: 0;
            padding: 0; /* Adjusted padding to remove extra space */
        }
        
        .container {
            background-color: #fff; /* Changed background color to white for contrast */
            padding: 20px;
            border-radius: 5px;
            box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
            width: 300px;
            max-width: 80%; /* Added max-width for responsiveness */
        }
        
        h2 {
            text-align: center;
            margin-bottom: 20px;
            color: #333; /* Adjusted heading color for better readability */
        }
        
        input[type="text"],
        input[type="password"],
        input[type="submit"] {
            padding: 10px;
            margin: 10px 0;
            width: 100%; /* Adjusted input width to 100% for better alignment */
            display: block;
            box-sizing: border-box; /* Ensures padding and border are included in width */
        }
        
        input[type="submit"] {
            background-color: #4CAF50;
            color: white;
            border: none;
            cursor: pointer;
        }
        
        button {
            margin-top: 10px;
            padding: 10px;
            border: none;
            border-radius: 3px;
            background-color: #007bff;
            color: #fff;
            cursor: pointer;
            width: 100%;
        }
        
        button:hover {
            background-color: #0056b3;
        }
        
        .link {
            text-align: center;
            margin-top: 10px;
        }
        
        form {
            display: inline-block;
            padding: 20px;
            border: 1px solid #ccc;
            border-radius: 5px;
            background-color: #f9f9f9; /* Lightened background color for form */
        }
        
        a {
            text-decoration: none;
            color: #4CAF50;
        }
        
        h4 {
            color: red;
            margin-top: 0; /* Added to remove extra margin */
        }